[TD-10533]<hotfix>:add return value to pass windows compilation

src/os/src/detail/osTime.c

@@ -411,8 +411,10 @@ int64_t convertTimePrecision(int64_t time, int32_t fromPrecision, int32_t toPrec
           return time;
       }
     } //end from nano
-    default:
+    default: {
       assert(0);
+      return time;  // only to pass windows compilation
+    }
   } //end switch fromPrecision
 }